Cylinder lock



June 26, 1928.

H. B. PAGE CYLINDER LOCK Filed Jan. 9, .1923

Patented June 2e, 192s.

. UNITED HARRY B. PAGE, or As'r HA EN; CONNECTICUT, ASSIGNORrosnnen'ivra COMPANY,

or new HAV N. CONNECTICUT.

CYLINDER Loon.

A'pplication filedtJamiary 9,1923. Serial No. 611,686.

This application relates-to cylinder vlocks and more especially to theprovision of anarmored or hard metal front or casing; to!" looks of-thischaracter, so tha'tsanyattempt to render the lockuseless orineffectual-by drilling into the front thereof may be true-.5

trated.

the drawings accompanying the application,

der looks as well.

In some types of locks,and especially 1n 16 may, by drilling into thelock in the plane plug may then be turnedfreely to unlock the door. Suchan operation is usually-per: formed by drilling iii-through the face ofthe lock cylinder-,which must necessarily be made of metal sufficientlysoft to admit of 7 of. which will be equal. tothe thickness of beingbored by a drill. I

One object of my invention is to overcome the disadvantage named aboveand. to proa vide a lock cylinder with a hard metalffront which willwithstand the. action of a drill. Another object of myinvent ion is topro: vide a lock with an armored front, of this character, secured orattached to, the} lock in a novel way. '.:.l

A still'further object of my invention is,

to provide an armored lock cylinder of the character described, whichshall be simple in construction and economical to manuface I shapedpiece of hardened steel or the like true and assemble. f

To these and other ends, the invention consists in' the novel featuresand combinaand claimed. I

' In the accompanying drawings:

Fig. 1 is a front elevational View of aqlock cylinder embodying myinvention," I

Fig. 2 a sectional View of line 2 -2 of Fig. 1; ,1;

Fig. is a sectional View OIltllIlG 3 -3 of Fig.2; Fig. 4 is a frontelevational; view-showing the method of'assembly of the parts of theylock; V Y

ig. 5 1s a sectlonal View on hne 5v-.-5,-of Fig. 3;

Fig.

it will be understood that myginvention'is not limited in all of itsaspects to such locks, but may be appliedto other types of cyhn:

' serted, it may be rotated within the cylthe case of pin tumbler locks,andntruder.

tions of parts to be hereinafter described;

G is a sectional View on line 66 ofv Fig. 2 with the key barrel removed;while" Fig. 7 is a'section;throughthe hardened front. plate of the lockcorresponding to line 77 of Fig.' 6, thelockcylinderbeing shown inelevation. i 1

In the form of my invention which I have chosen to illustrate anddescribe, I have u 4 :ishowna lock cylinderat 10 provided with WVhile Ihave shown pin tumbler locks 1n the usual pin tumbler openings 11, andakey 14 so that when the proper key-is in-,

inder 10, and a lug 15, eccentrically mounted upon the rear end of thekey barrel, will serve to raise a bolt or thelike mounted i n.-

. the recess 16 in the cylinder." To retain the 7 key plug within thecylinder, arecess orslot [17 .is formed inthe plugand a pin or'jscrew"the armored frontfZl, so that after the front has'been applied,theexterior of the cylin- [der will be of the same diameter throughout.Forwardlyof this shoulder and at dimay be cut awayas at 22'and 23in's'egmental" form,- and opening into these segmental recessesare slots24 and 25, which slots do not, howevelyas clearly shown in ;F ig. 5,extendto the front face of the cylinder as do the cut-away portions 22and 23.

The armored front 21 consists of a cup ametrically opposite portions,the cylinder having a front face of the same diameter as that ofthe bodyofthe cylinder 'lock,'and I provided with a peripheral wall or flange"126 extendingat right angles to the front face. Projectinginwardly fromthis flange or wall are a pair of oppositely disposed f, lugs 27 and28which may be'formed so that their lengths are substantially.equal tothe al- [titudes of the segments 22 and 23;

This front plate is provided with an openmg 29v through-which the keybarrel extends,

and this opening isso disposed "relativelyto the lugs 27 and28 that itwill bein align- "ment with the key barrel opening in the lock 1cylinder when the lugs 27 and 28 are located in the grooves 24 and 25. I1 When the parts are made 1n themanner described, and it is desired toassemble the lit) cup-shaped member is placed by a longitudi nal thrustupon the shouldered end of the cylinder with lugs, 27 and 28 in thesegmental cut-out portions 22 and 23 as shown in 4. It will be apparentthat when the parts are in this position, a relative rotative movementwill move the lugs from the cut-out portions 22 and 28 into the notchesor slots 24 and25 from which they cannot be dislodged by a directlongitudinal pull. In fact the armored front can only be removed by areverse i otative movement which again disposes the lugs in the cutoutportions 22 and 23.1 llv ith the parts in the position shown in Fig. 3wherein the lugs are engaged in the slots, the opening 29' in thearmored front is opposite the key plug opening in the cylinder, and ifthe key plug is now inserted its head 31, which lies Within the opening29, will prevent a. reverse or any further rotation of the armoredfront. The Withdrawal of the key plug will then be; prevented by theinsertion of the key plug pin 18, and the parts Will be effectually andpermanently assembled in a very convenient and satisfactory manner.

Itwill be seen that while the armored front described Will protect thepin tumblers which are located in the cylinder, the turnblers which arewithin the key barrel will not b e so protected, due to the fact thatthey willlie opposite the opening 29. In order to protect the tumblersin the key barrel from the drilling operation described, a pin 32 ofhardened steel or the like may be inserted in the head or shoulder atthe front of the key barrel and in alignment With the pin tumblerstherein. It Will then be impossible to drill through the line oftumb'lers in the key barrel as the drill,- upon striking thispin, willbe unable to pierce it and will be diverted to one side-, and thus severthe pin tumblers of the look.

It will be apparent that the recessed or cutout portions 22 and 23provide longitudinal passage ways upon the periphery of the lock Whichcommunicates with the peripheral grooves 24 and 25 in a manner similarin many respects to the longitudinal and transverse grooves which formeda part of the joint usually termed a bayonet joint. In other words, itmay be correctly stated that the front plate and applicants lock issecured upon the cylinder by means of a bayonet oint;

lVhile I have shown'and described a preferred embodiment of myinvention, it will be understood that it is'not limited to all thedetails shown, but is capable of modification and variation within thespirit of the invention and within the scope of the appended claims.

What I claim isi 1. A look cylinder and a hardened plate will; not

for the front of said cylinder, and cooperating engaging means upon saidcylinder and plate whereby said plate may be applied directly to thecylinder and then rotated to a locking position. J

'2. A lock cylinder and a front plate for the same, said plate having anaxially projecting flange extending along the curved surface of the.cylinder and cooperating means upon said cylinder and flange Whereby theplate may be applied to the cylinder by a longitudinal thrust and thenrotated to a locking position.

3. A look cylinder the-same, said cylinder and plate liavingcooperatinggrooves and lugs whereby they maybe secured together by a relativerotative movement.

and a front plate for i 41A lock cylinder and a front plate therefor,said plate havinga circumferential flange adapted to extend along thebody of the eyhnden: said flange and cylinder having cooperating groovesand projecting lugs whereby they may be secui'ed together by a relativerotative movement:

5'; A look cylinder and a hardened front plate for the same, said platehaving a circumferential flange adaptedto lie along the body of thecylinder, a lug provided upon said flange, and a lug receiving grooveprovided in the periphery of the cylinder Whereby the plate may beattached thereto.

6. A lock cylinder and a. front plate therefor, said cylinder having atransverse groove formed therein adj acent' one endjthere'of and apassage Way leadinginto said groove from" the front edge-of thecylinder, and saidp'late having a lug toenter saidpassage Way andgrooves. p

75A lock cylinder and a hardened front plate therefor, said cylinderhaving a e ripheral groove formed therein adjacent one end thereofand'a' passage way leadinginto said groove from the front edge of thecylinder, and said plate having a lug to enter said passage Way by adirect longitudinal thrust whereby it may then rotated in said groove.

8. A look cylinder provided with a transverse groove and a passage wayleading from the front face of the cylinder into said groove to providean attaching means for a plate.

9. A look cylinder and a hardened front plate therefor, means to securesaid plate upon the cylinder by a rotative movement; and means toprevent a reverserotation and removal of said plate.

10. A lock cylinder and a. hardened front plate therefor adapted to beapplied to the cylinder by a direct longitudinal thrust and.

then rotated to locking position, andineans to prevent a reverserotation of said plate to prevent its removal from the cylinder.

11. A lock cylinder, a hardened front plate therefor adapted to beapplied to the cylinder by a direct longitudinal thrust and then rotatedto a predetermined position, and means to secure the plate againstrotation from this position. i

12. A look cylinder and ahardened front plate therefor, both saidmembers having openings adapted to be aligned with each other to receivea key barrel, means for securing the plate to the cylinder when theformer is applied to the latter, and rotated to bring said openings intoalignment, and means to prevent further rotation of said plate.

13. plate adapted to be applied thereto by a longitudinal thrust, bothsaid members be ing provided with openings to receive a key barrel,means to permit such application only when said openings are out ofalignment, said plate being then rotatable to align said openings, andmeans to secure the plate upon the cylinder in said position ofalignment.

14. A look cylinder and a hardened front plate therefor, said platebeing adapted to be secured thereon by a rotative movement,

both said members having key barrel receiving openings which are alignedwhen said plate is secured upon said cylinder, and a key barrel securedin said openings to prevent rotation of the parts from said position.

15. A look cylinder and a hardened front plate therefor, said cylinderbeing provided with a peripheral groove and a longitudinal passage wayopening into said groove from the front face of the cylinder, said platebeing provided with a lug to enter said passageway and then to berotated in said groove, bothsaid cylinder and plate being provided withkey barrel openings which are eccentric when the lug is in said passageway, but which may be aligned by the, rotation of the lug in the grooveand a key barrel inserted in said aligned openings to prevent rotationof the plate from said position.

16. In a look, a lock cylinder, a hardened front plate therefor, andsecured thereto by a bayonet joint. I

17. In combination, a lock cylinder, a protective facing thereforprovided with a peripheral flange, said cylinder being tele scopicallyreceived in the flange, and means eflective after a relative rotation ofthe parts to lock the facing to the cylinder.

18. In combination, a lock case, a protective facing therefor, both ofsaid members being provided with key barrel openings, interengagingmeans upon said case and facing to securethe two together, said meansbeing capable of disengagement to permit separation of the parts onlywhen the key barrel openings are out of register.

A look cylinder and a hardened front.

19. In combination, a lock case, a protec- V tive facing thereforsecured thereto by a rotative movement, 'a key barrel mounted inopenings in said case and facing, and means including said key barrel toprevent removal of the facing from the case.

20. A look cylinder'and a protective facing therefor, said facing beingapplied directly to the cylinder and then rotated' through a partialrevolution, and means effective upon said rotation to prevent separationof the facing and cylinder.

21. A look cylinder and a hardened front plate therefor, said cylinderhaving a. peripheral groove formed therein ad]acent=- one said groovefrom the front edge of the cylinder, the plate being provided with a endthereof, and a passageway leading into lug to enter said passageway andgroove,

turned lug at the rear end of said encircling portion to enter a recessin the case to secure the armor thereon.

24. In combination, a lock cylinder, a protecting armor therefor, saidarmor comprising a cylindrical portion encircling the cyl-, inder, andhaving means at each end thereof extending inwardly to embrace a part ofthe lock cylinder therebetween to prevent removal of the armor.

25. A look cylinder and a front plate therefor, said cylinder and platehaving cooperating means whereby they may be secured together, saidmeans being adapted to being brought into engagement by a rotativemovement of said plate on said cylinder, and means to prevent reverserotation of the plate.

26. In combination, a lock cylinder, a protective face memberthereforprovided with a. flange extending axially of the cylinder, saidface member being applied to the cylinder with the latter and the flangein tele- HARRY B. PAGE.

